package com.itheima.service;

import com.alibaba.dubbo.config.annotation.Reference;
import com.itheima.pojo.Permission;
import com.itheima.pojo.Role;
import com.itheima.pojo.User;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Component;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;

@Component
public class SpringSecurityUserService implements UserDetailsService {

    @Reference
    private SecurityUserService securityUserService;

    //根据用户名查询数据库中的用户信息
    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        User user = securityUserService.findByUsername(username);
        if (user != null) {
            List<GrantedAuthority> list = new ArrayList<>();
            //获取用户角色
            Set<Role> roles = user.getRoles();
            //遍历角色
            for (Role role : roles) {
                //授予角色
                list.add(new SimpleGrantedAuthority(role.getKeyword()));
                //根据角色，授予权限
                Set<Permission> permissions = role.getPermissions();
                for (Permission permission : permissions) {
                    list.add(new SimpleGrantedAuthority(permission.getKeyword()));
                }
            }
            //进行比对
            org.springframework.security.core.userdetails.User securityUser = new org.springframework.security.core.userdetails.User(username, user.getPassword(), list);
            return securityUser;
        } else {
            return null;
        }

    }
}
